With the relaunch of the Ultimate line I decided to go back and re-read the entire run of USM. Figured I might as well put together a chronology while I was at it (since there doesn't seem to be one here beyond issue 32).

Considering this was a mostly self-contained title in a brand new universe it didn't take too much trouble piecing things together. There were a few tricky fits stemming from the Team-Up series (#9!), Ultimate Power, and the War of the Symbiotes arc. I did take notes for all significant character appearances beyond Spidey and could possibly list those at some future point if there is any interest.

* The editor notes for ULTSM 126-128 place these issues prior to ULTS3 and thus push them earlier in continuity than their release order.
** It should be noted that because of references in ULTSM@3 the issues 121 & 122 had to be placed out of order.

USM #9 shouldn't be counted as Bendis himself has stated it's not canon.

Some problems arise with making a timeline when you consider that Spidey has met both Elektra and the X-Men for the first time twice (Elektra in the SS and Cats & Kings and the X-Men in UMTU #11 and Irresponsible).

Also, do yourself a favor and ignore any references to the passage of time and what year they are in school. Trying to figure out when the Spider-Man movie in their world came out almost gave me an aneurysm.

Marvel Boy wrote:USM #9 shouldn't be counted as Bendis himself has stated it's not canon.

I assume you mean ULTMTU 9. There is a reference to this issue in ULTSM:R 2 which points to its inclusion. It could very easily be dismissed but I chose to put it in continuity with the silly explanation that it was a practical joke by Torch.

Marvel Boy wrote:Some problems arise with making a timeline when you consider that Spidey has met both Elektra and the X-Men for the first time twice (Elektra in the SS and Cats & Kings and the X-Men in UMTU #11 and Irresponsible).

In regards to Elektra, the encounter in ULTSMSS 1 is very brief and she is in a different costume. As for the X-men, the encounter in "Irresponsible" involves the team actually in costume with different members and a trip to the mansion.

Marvel Boy wrote:Also, do yourself a favor and ignore any references to the passage of time and what year they are in school. Trying to figure out when the Spider-Man movie in their world came out almost gave me an aneurysm.

I ignore almost all temporal references in comics. My chronology philosophy is the simple A before B before C method. I tend to think that all of USM was his sophomore year and UCSM could be his junior year.